P3 LEFT ATRIAL LONGITUDINAL STRAIN AND ELECTROANATOMICAL MAPPING DURING TRANSCATHETER PULMONARY VEINS ISOLATION IN PAROXYSMAL ATRIAL FIBRILLATION

Autor: V Siviero, D Previato, L Trento, A Rossillo, C Bonanno, F Caprioglio, L Ribichini
Rok vydání: 2022
Předmět:
Zdroj: European Heart Journal Supplements. 24
ISSN: 1554-2815
1520-765X
DOI: 10.1093/eurheartj/suac012.002
Popis: Atrial fibrillation is associated with electro–morphological remodelling of the left atrium which causes abnormalities in atrial structure and function. Several imaging methods are used to find fibrosis of the left atrium comprehending echocardiographic imaging, magnetic resonance imaging and electroanatomic imaging. This study aims to find a correlation between the reduction of left atrium function and low potential area (LPA) at electroanatomical imaging in the whole left atrium (LA) as an expression of structural and electrical LA remodelling. Methods Patients undergoing radiofrequency pulmonary vein isolation in the contest of atrial fibrillation ablation were retrospectively screened, echocardiographic and electroanatomical (EAM) imaging were evaluated separately offline. Results The study group consisted of 20 patients (70% males, mean age 63 ± 10 years). All patients were in sinus rhythm at the time of the procedure. Mean left ventricular ejection fraction was 60±11%, mean indexed LA volume was 41±10 ml/m2 and mean pre procedural PALS was 26,2±7,6%. We found a negative relation between LA EF and PALS with correlation coefficient (r) of 0,78 (p Conclusion PALS reflects the amount of LPA located prevalently in PVs in patients with low percentage of diseased tissues in LA. Patients with AF with high atrial volumes, low PALS and more extended VP LPA seems to have a higher degree of atrial remodelling, both anatomical and electrical. Moreover, values of post–AF ablation PALS didn’t differ significantly from the pre–procedural ones, this could mean that the structural remodelling takes more time after the electrical remodelling induced by the ablation procedure.
Databáze: OpenAIRE
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